Method of embossing



July 6 1926.

I J. T. A. PADDENBURG METHOD OF EMBOSSING Filed August 25, 1923 i ni- Joa a. rAnnnNBn-Re, on ROOKLYN, new YORK, assrsnoa TO THE Jenn o. rownns company, Inc, OF NEW YORK, n. Y., A coarona'rron on NEW Yoiin;

METHOD or EMBOSSING.

Application filed August 25, 1923. Serial No. 659,289.

It'has been proposed to producesimulations of cloth and like objects by embossing the same on paper or cardboard, but in the production of these simulations it has been the practice to produce a plate or die by etching and engraving on the same a representation of the texture of the cloth or other object which it is desired to reproduce. The exactness, however, of this simulation depends on the skill of the artist who etches orengravesthe die, and consequently the replic'ais'not a'true reproduction of-the object. s .r

. My invention. contemplates the production ofa replica which is an, actual simulation of the object,and which does not. depend upon the skill of an artist for the truth of its reproduction. .11 attain this result by the use of the actual object itself in the method of producing its replica;

The production of the replica by my means'isbroadly accomplished by forming a mold or female die from the object to be reproduced, and using this die inconnection with a pliable and male die in the. actual reproduction of the replica on paper or cardboard. V a In the drawing I have illustrated .a replica of a slab of stucco (Figure -1 being; a' plan view and Figure 2 a cross sectioii), inasmuch as the invention is; admirably adapted for such; work in that it shows the exact design and texture of the stucco. It, l1OWeV6I,iS-tO be understood that I do not confine my invention to use in connection with the reproduction of stucco, for it is quite obvious that it can be used in the production of replicas of various other objects V The replica itself consists'of a sheet or plaque of paper or cardboard, sufficiently soft to permit embossing without cracking, on which the design of the object is impressed. For instance, in the case illustrated in th'drawing, where the replica is thatof a slab of stucco, the paper plaque l carries the embossed replica of, the stucco, showilig'a, reproduction of the trowel marks 2, with the ridges and Vales, and showing also the actual texture of the surface of the stucco where, for instance, at 3 a stippled effeet is produced by the effect of the grains of'san-d. .I have used sea'eral methodsof producing the embossing of the object, from the the object itself, and I will enumerate three of thesa the last of which I consider the preferable, p r

. Assuming that it is desired to produce a replica of a slab of-stucco such as illustrated in the drawing, 1 have found it possible to make an impression from the surface to be reproduced on a waxed sheetof brass. This wax is covered with a suitable metallizing medium such as graphite-so as to establish an afhnity forthe metal which is later precipitated thereon. This sheet of brass, with the graphite-covered wax impression thereon, is then suspended in anelectro-met-al bath for asufficient length of time to permit the formation of a metal shell thereon. While there is no definite time for this suspension, as it is to be determined by experimentation and bythe strength of thebath and other; features, it usually takes from four to five hours for the'proper amount of metal to depositthereon to produce a shell of sufiicientthiclmess to have the necessary; rigidity for subsequent.use.

- Then this desiredithickness has been obtained the shell is detached from the wax form and is backed up with metal. This shell-represents a facsimile in metal ofthe originalsurface. of which it is desired to make a replica inasmuch as the Wax was in effect, a negative and thennetal deposited thereon in shell form therefore became a positive. The object ofmakingthismetal positive issothat a mastermodelistronger and harder than the object itself may boobtained for subsequent use so that. it will stand-up under repeatedimpressions, A wax impression is made of this metal posi-- tive or shellandthis wax impressiom-being again av negative impression, is coated with graphite or other metalli zingimedium and an additional shell is made inthe same manner as before, that is to say, by submerging the same. in an electro-metal bath and precipitating' the desired amount of metal thereon. But the shell thus obtained from this last precipitation is backed up withv metal and usedas a female die in the subsequent embossing operation. a

- A second method of producing the female die which I have found possible is to make a plaster cast from the object or which the embossed replica is to be made, instead. of mak' ingthe-first facsimile metal shell of the hereinbefore described methods. When this plaster cast is made, an impression is made ing the coated object in an electro me'tal bath to form a shell.

4. The method of producing an embossed replica of an object on a sheet of paper or the like, which includes saturating the ob ject with a solution adapted to fill the interstices therein, filling in any undercuts on said saturated object, coating the surface of the object with a metallizing medium, suspending the coated object in an electro-metal bath to form a shell, backing up said metal shell to form a female die, pressing a relatively softer sheet of material into said female die to form a male die, and pressing said male and female dies together with the sheet to be embossed arranged between them.

5, The method of producing dies from an object, which includes forming a metal shell on said object, backing up said metal shell to form a female die and pressing a relatively softer sheet of metal into said female die to form a male die. I

6. The method of producing dies from an object, which includes filling in any undercuts on said object, forming a metal shell on said object to produce a female die, and pressing a relatively softer material into said female die to form a male die.

In testimony whereof, I have signed my name to this specification this 23rd day of August, 1923. 7

JOHN T. A. PADDENBURG. 

